I have a subaru 7 horsepower robin e x 21 engine and the carburetor on it had been completely rusted through . otherwise the engine is in great shape and I really want to use it however the only replacement carburetor I could find was through subaru in the wanted 140 dollars for it and there's no way I'm going to pay that much for a stock carburetor . I have seen on the site that people were selling subaru robbins with minkubi carburetors . can someone please tell me which of the minkunis will fit my engine thank you . or if someone has 1 I will buy it from them or any other kind of carburetor that will fit please let me know which 1 so I can get . thanks.